Native development with the same awesome React framework!? SIGN ME UPPP!
It's the best of both worlds! The large, mature, and barebones set-up of React, combined with the native development approach of Flutter. What is there not to like?
Being familiar with JS and the React framework, I didn't want to learn an entirely different language like Dart.
Furthermore, I prefer functional programming. While React is not purely functional by any standard, its barebones approach makes it easier to customize the framework to your prefered paradigm and style, which is why I prefer it over other alternatives like Angular JS and Flutter.